JPS58168Y2 - Bracket with lens extension mechanism - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bracket provided with a mechanism for feeding out a camera lens.

When taking pictures with a strobe attached to a camera, small strobes are generally attached directly to a shoe provided on the top of the camera, while large strobes are often attached to a bracket fixed to the camera body.

That is, as shown in FIG. 1, a grip part 2 with a strobe 1 attached to the top and a bracket 3 are integrated with a grip set screw 4, and further fixed to a camera body 6 with a camera set screw 5.

Generally, when operating such a camera, if the bracket 3 is not attached, the right hand operates the film winding lever 7 and the release button 8, the left hand supports the bottom of the camera body 1, and the lens distance is 1". Adjust the distance by turning ring 9.

Part 1? The shape of regular cameras is also designed to accommodate this type of operation.

However, when the bracket 3 is attached, the most stable way to support the strobe 1 and the grip 2 is to hold the grip with the left hand in order to support the weight of the strobe 1 and the grip 2.

In this state, in order to adjust the distance with your left hand, you have to support the entire weight with your right hand, resulting in a significant lack of stability.

Also, while holding the grip part 3 with your left hand, you must take your right hand away from the release button 8 to adjust the distance with your right hand.
There was a drawback that quick shooting was not possible.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, it is an object of the present invention to provide a bracket that is equipped with a mechanism that allows the distance ring to be rotated remotely and that allows rapid distance adjustment while maintaining a stable support state.

Embodiments of the present invention will be described below with reference to FIGS. 2 and 3.

FIG. 2 shows the bracket according to the present invention attached to a camera, and FIG. 3 shows its internal mechanism.

The bracket of this invention can be broadly divided into distance adjustment knobs 1
0 at the end of the bracket body 11. It is composed of a roller pressing unit 12 and a drive roller 13.

The distance adjustment knob 10 is provided adjacent to and coaxially with the grip set screw 4, and a drive shaft 14 is arranged in the central part of the bracket body 11 in parallel with the central axis of the camera lens.

The rotation of the distance adjustment knob 10 is transmitted to the drive shaft 14 via spur gears 15, 16 and intermediate shaft 17, and further converted into rotation in the right angle direction by bevel gears 18, 19.

Note that the intermediate shaft 17 and the drive shaft 14 are connected to the bracket main body 11.
The roller pressing unit 12 is supported using an internal partition wall (not shown), and the roller pressing unit 12 is supported by a movable plate member 21.2.
It is composed of a shaft 23 and a roller shaft 24 supported by a shaft 23 and a roller shaft 24, spur gears 25 and 26 for interlocking both shafts, and a housing 27.

The shaft 23 slightly protrudes to the rear of the housing 27, and a notch 23a provided at the tip of the shaft 23 corresponds to the protrusion 14 at the tip of the drive shaft 14.
a and the rotation is transmitted.

Further, one end of the roller shaft 24 protrudes from the front surface of the housing 27,
A drive roller 13 is attached to the tip.

In order to press the driving roller 13 against the lens distance ring 9, the roller pressing unit 12 has a kind of planetary gear mechanism inside.

That is, the roller shaft 24 is supported only by the movable plate members 21 and 22, but the shaft 23 is further supported at both ends using the housing 27 as bearings.

Therefore, the roller shaft 24 is rotatable about the shaft 23, and a pressing force is applied by the spring member 28 in the direction of the arrow shown in the figure.

Further, a substantially oval window 29 is formed on the front surface of the housing 27 along the locus of the roller shaft 24.

The roller pressing unit 12 has a structure that can be removed from the bracket main body 11.

A locking pin 31 that fits into the hole 30 on the front surface of the bracket body 11 is attached to the rear surface of the housing 27, and the drive shaft 14 and the shaft 23 are fixed together with an appropriate fastener (not shown). be done.

The operation of the diagonal embodiment will be explained below.

When the bracket of the present invention is attached to the camera body 6, when the distance adjusting knob 10 is turned with the fingertip of the left hand holding the grip part 2, the driving roller 13 moves in conjunction with the lens distance ring 9 that is engaged with the roller. The distance is adjusted by rotating.

At this time, by providing the aforementioned roller pressing mechanism,
Even when lenses of different diameters are attached, the drive roller 13 always engages with the lens distance ring 9 with appropriate pressure, and lenses can be easily exchanged by pushing down the drive roller 13.

In this embodiment, the roller pressing unit 12 is separable from the bracket main body 11, and has the advantage that once removed, it can be used as a normal bracket.

However, such a pressing mechanism may be integrated into the bracket main body 11, and the distance adjustment knob 10 may be placed on the grip portion 2 side to achieve the same effect.

As described above, according to the present invention, when taking pictures with a bracket attached to the camera, distance adjustment can be easily done in the most stable support state or at hand, and particularly quick shooting operations are required. It has a remarkable effect in some cases.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a conventional bracket attached to a camera, Fig. 2 is a front view showing a bracket according to the present invention attached to a camera, and Fig. 3 is an outline of the internal mechanism of the bracket according to the present invention. FIG. 4... Distance adjustment knob, 6... Camera body, 9... Lens distance ring, 11...
Bracket body, 12. ...Roller pressing unit, 13... Drive roller.

Claims (1)

[Scope of utility model registration request] In the strobe bracket attached to the bottom of the camera,
a knob for adjusting the distance; a drive roller that engages with the lens distance ring and rotates the distance ring; a rotation transmission mechanism for interlocking the distance adjustment knob and the drive roller; and a rotation transmission mechanism that brings the drive roller into close contact with the distance ring. A bracket with a lens feeding mechanism, which is equipped with a pressing mechanism for moving the lens.